The first letter in the Latin Alphabet. People who search this letter up either have never seen the Latin Alphabet or are that bored.
Example 1
Person 1: "What is the first letter of the Latin Alphabet?" (In foreign Language)
Person 2: "A" (In foreign Language)
Example 2
Person 1: " I want to go to the Urban Dictionary and look at some random words because I have no life" (In a language that uses the Latin Alphabet)
The way programmers can annoy the hell out of the people who run their programs. It is an escape character that is known as the "bell character" that makes the internal speaker in your computer beep. '\a' can be used in many programming languages, including C, C++, and PASCAL.
Below is an example written in C that will make your computer beep forever (or at least until you close the program).